Improvement on High Frame Rate Ultrasonic Imaging System Based-on Linear Frequency-Modulated Signal

Author

Han, X.-m. ; Peng Hu ; Li, Xiao-Xin ; Cai Bo

Author_Institution

Sch. of Inf. Eng., Southwest Univ. of Sci.& Technol., Mianyang

fYear

2008

Firstpage

2115

Lastpage

2118

Abstract

The high frame rate (HFR) ultrasonic imaging system based on linear frequency-modulated (LFM) signal constructs images at a high frame rate and the signal-to-noise rate (SNR) of this system can also be improved. Unfortunately, such pulse compression methods that increase the SNR usually cause range sidelobe artifacts. In an imaging situation, the effects of the sidelobes extending on either side of the compressed pulse will be self-noise along the axial direction and masking of weaker echoes. The improvement on high frame rate ultrasonic imaging system based on LFM signal is considered in this paper. In this proposed scheme, a predistorted LFM signal is used as excited signal and an mismatched filter is applied on receive. The results show that the proposed HFR ultrasonic imaging system can achieve higher SNR and the axial resolution is also improved.

Keywords

biomedical ultrasonics; filtering theory; frequency modulation; medical image processing; axial resolution; excited signal; high-frame rate ultrasonic imaging system; linear frequency-modulated signal; mismatched filter; predistorted LFM signal; sidelobe artifacts; signal-to-noise rate; Acoustic scattering; Acoustic transducers; Filters; Frequency; Image resolution; Pulse compression methods; Radar scattering; Signal resolution; Ultrasonic imaging; Ultrasonic transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Bioinformatics and Biomedical Engineering, 2008. ICBBE 2008. The 2nd International Conference on

Conference_Location

Shanghai

Print_ISBN

978-1-4244-1747-6

Electronic_ISBN

978-1-4244-1748-3

Type

conf

DOI

10.1109/ICBBE.2008.858

Filename

4535738